I. Core Features
Chemical composition and form
Chemical formula: AlOOH·nH?O (n=0.08-0.62), with high crystal phase purity (≥99.9%), it belongs to incomplete crystalline hydrated alumina.
Physical form: The wet product is a white thixotropic gel, and the dry product is a powder with good fluidity.
Structural performance
High specific surface area: Provides sufficient active sites.
Large pore volume and adjustable pore size: By regulating the pore size distribution through the process, it can meet different catalytic requirements.
Excellent solubility: Solubility rate ≥95% (up to 98% for products produced by the aluminum alcohol method), forms stable sol when encountering dilute acid.
Thermal stability: It undergoes low-temperature dehydration to convert into highly active γ-Al?O?, and high-temperature calcination generates nano-scale α-Al?O?.
Ii. Production Process
High-end preparation route: Organic aluminum alcohol hydrolysis method: Core process (benchmarking against the German SB powder standard), using aluminum alcohol salt as raw material, the product purity is extremely high, and the pore volume and specific surface area are superior to traditional methods.
Impurity control: Sodium content ≤0.3% (by mass fraction) to ensure that the catalytic activity is not disturbed.
Key points of the process: Carbonization stage: Control the CO? aeration time and the concentration of sodium aluminate solution. Aging treatment: Control the aging time at a temperature above 90℃ to optimize crystallinity and filtration performance. Drying process: Steam/electric heating temperature control, precise moisture content control.
Iii. Core Application Fields
Catalysts and carriers in petrochemicals: As a double aluminum-based binder for FCC catalysts, it enhances strength, hydrothermal stability and activity. Used as a catalyst carrier for hydrofining and reforming.
Environmental protection catalysis: Preparation of Claus sulfur recovery catalysts and catalysts for incineration of tail gas containing organic substances.
High-end material manufacturing of nano-alumina precursors: The γ-Al?O? obtained through calcination is used as a highly efficient catalyst, while α-Al?O? is applied in high-end ceramics, polishing materials and lithium battery coatings.
Adsorption material: It can efficiently remove heavy metal ions (such as Pb²?, with an adsorption capacity of up to 328mg/g) and organic pollutants, and is suitable for wastewater treatment.
New energy: As a structural guide for lithium battery cathode materials, it enhances the layered order degree to 98% and extends the cycle life.
Biomedical: PEG modification is used for targeted delivery of anti-cancer drugs, with a tumor suppression rate of 81%.
Iv. Competitive Advantages in the Market
Customization capability: The specific surface area, pore volume and particle size distribution can be adjusted according to requirements.
Environmental benefits: The aluminum alcohol method process has basically no waste emissions (the sodium carbonization method requires a large amount of water for washing).
Technical barriers: High purity (99.99% electronic grade) and leading gel solubility performance in the industry.